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Let f:[2, oo)rarrR be the function defin...

Let `f:[2, oo)rarrR` be the function defined by `f(x)=x^(2)-4x+5`, then the range of f is

A

`[5, oo)`

B

`(-oo, oo)`

C

`[1, oo)`

D

`(1, oo)`

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